Ever wonder *how* what you eat translates to longer, stronger hair? It happens at a microscopic level. Minerals like Zinc and Iron are non-negotiable for a healthy hair growth cycle. Zinc acts as a "builder," helping to create the very protein your hair is made of, while Iron acts as the "fuel," delivering essential oxygen to your follicles. Without them, the whole process stalls. Save this essential hair science lesson! Follow @hairgrowth5-4 for more on the biology of hair...